Wednesday, May 1, 2013

How many Virtual Users can a NeoLoad Load Generator generate?


How many Virtual Users can a Load Generator generate?
This will depend on the application tested, the scenario and its parameters, particularly the think time between pages: a Load Generator can generate approximately twice as heavy a load with a think time of two seconds than with a think time of one second.

Likewise, generating a load using HTTPS (SSL) and using modules such as Flex, GWT, Oracle Forms, Java Serialization, RTMP and Siebel use up more machine resources than with HTTP.

As an example, a Pentium IV 2.4GHz can generate up to 1500 Hits/sec. A Load Generator typically can generate between 500 and 1500 users on a standard application.

It should be noted that the NeoLoad Controller can use as many Load Generators as is required to generate the number of users specified in the license, at no additional cost.


Reference:
http://www.neotys.com/documents/doc/neoload/latest/en/html/index.html#2837.htm

Sunday, July 29, 2012

java.io.IOException: Exceeeded maximum number of redirects: 5

java.io.IOException: Exceeeded maximum number of redirects: 5

at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.followRedirects(HTTPS
amplerBase.java:1326)

at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.resultProcessing(HTTP
SamplerBase.java:1373)

at
org.apache.jmeter.protocol.http.sampler.HTTPSampler.sample(HTTPSampler.java:5
28)

at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBas
e.java:1021)

at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBas
e.java:1007)

at
org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:290)

at java.lang.Thread.run(Unknown Source)

-----
Look at the request closely on view results tree listener on why is it redirecting that many times. There is a parameter in jmeter.properties called httpsampler.max_redirects which could be changed to increase the limit. However it wouldn't be recommended. The adequate redirect limit can be set to 20 (Firefox)

or

Try disabling follow redirects, and see what the first page says in the tree view listener.


Thursday, February 16, 2012

Throttle Internet Bandwidth on Windows


To throttle the network bandwidth for slow internet connections / emulate different bandwidths.


Throttling Bandwidth During Load Testing Using JMeter.
Charles: http://www.sujitnayak.com/?p=447


Throttle Internet Bandwidth on Windows
NetBalancer: http://geeknizer.com/windows-bandwidth-throttle/

Tuesday, November 8, 2011

Per'F'resher


1. Keywords
2. SVN
3. JM Exercises
4. JM Distributed testing
5. Report generator
6. Per-Rep overview
7. Log parser
8. Batch files scripting
9. VB script
10. Prop document
11. TPln document
12. Sever Metrics

Thursday, September 8, 2011

List of completed tasks

1. Utility to find the internet connection in all the machines. (PT) -- Done -- mts
2. Need to understand impact of network bandwidth on client side load generation. (PT) -- Done -- mts
3. Working under Linux environment. (All) -- Done -- mts
4. Automation script to find the sys config in a n/w. -- Done --mts 
5. DotNet Profilers -- Done -- mts
6. Sql Profilers -- Done -- mts

7. Setting up Performance Lab (Auto Perf Framework) (PT & AT) -- Done -- mts
8. List of items to learn by everyone. (PT) -- Done http://chkperftesting.blogspot.com/2011/11/perfresher.html
9. PT on Linux -- mts
10. Learning of multiple programming languages (C#, Java, VBScript, JScript, Perl etc.) in terms of automation i.e. how to launch, gather information, synchronize and close and application under test (AUT); manipulate and send test data to an AUT and generate test data. (AT) -- Done
11. Add JMeter Request Size (PT) -- Done
12. File groups -- Done
13. soasta.com/cloudtest/lite -- Done -- mts
14. Upload perf artifacts in SVN -- Done
15. Network Bandwidth Estimation -- Done
16. PageLoad Framework (Windows + C# + WatiN + IE,FF + Sql Serever + fyiReporting)